title: Ferroelectricity and ferromagnetism of La(0.5)Lu(0.5)Ni(0.5)Mn(0.5)O(3) thin films on Nb:SrTiO(3) substrates.
abstract: Epitaxial orthorhombic La(0.5)Lu(0.5)Ni(0.5)Mn(0.5)O(3) (LLNMO) thin films deposited on Nb:SrTiO(3) (NSTO) substrates are prepared by pulsed laser deposition and their ferroelectricity and magnetism are investigated using various techniques. It is revealed that the as-prepared thin films are ferromagnetic (FM) insulators. The FM transition occurring at ∼ 125 K is evidenced by the well defined hysteresis at low temperature, with a saturated magnetic moment as high as 1.8 µ(B)/f.u. at ∼ 5 K. A reversible ferroelectric polarization of ∼ 0.2 µC cm(-2) below ∼ 140 K is also observed. The magnetism can be understood by the FM ordering associated with a partially ordered major Ni(2 +)-Mn(4 +) plus minor Mn(3+)-Ni(3+) configuration, while the ferroelectricity is argued to originate from the A-site disordering of La(3+) and Lu(3+).
authors.affiliation: Laboratory of Solid State Microstructures, Nanjing University, Nanjing 210093, People's Republic of China.
authors.forename: S Z
authors.initials: SZ
authors.lastname: Li
authors.forename: C
authors.initials: C
authors.lastname: Zhu
authors.forename: Z B
authors.initials: ZB
authors.lastname: Yan
authors.forename: S J
authors.initials: SJ
authors.lastname: Luo
authors.forename: K F
authors.initials: KF
authors.lastname: Wang
authors.forename: J-M
authors.initials: JM
authors.lastname: Liu